Problem with 7i92 + 7i77 + 7i76 combo – Smart Serial not detected on P2

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07 Aug 2025 16:54 #333009 by Darksniped
Hi all,I'm struggling with the following Mesa card combination: 7i92 + 7i77 + 7i76.I’m using the firmware
7i92_7i77_7i76D.bit
. Unfortunately, only the Smart Serial peripheral on P1 is being detected — nothing shows up on P2.To clarify:
When I flash a different firmware, the same card that previously didn’t communicate on P2 works fine on P1, so I believe the Smart Serial slave and its power supply are OK.Here’s the output of
mesaflash
:
 yaml
CopyEdit
mesaflash --device 7i92T --addr 192.168.1.121 --readhmid Module: SSerial There are 1 of SSerial in configuration Version: 0 Registers: 6 BaseAddress: 5B00 ClockFrequency: 100.000 MHz Register Stride: 256 bytes Instance Stride: 64 bytes
I read somewhere that there should be more than one SSerial interface listed if both ports (P1 and P2) are configured for Smart Serial. It seems like the firmware might not be enabling SSerial on both channels.Has anyone encountered this issue?
Or is there someone with a working build environment who could check the Mesa source files to see if there's a configuration error?Any help would be greatly appreciated.@PCW – if you have a moment, your insight would be very welcome.

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07 Aug 2025 17:01 #333010 by PCW
One sserial port can have from 1 to 8 channels so the mesaflash information is correct.

If both cards don't show up in hal, its likely that they are not enabled in the sserial_port_0=nnnxxxx
stanza in the driver command line



 

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